Alexander Gordeev ff1aa430a2
PCI/MSI: Add pci_msix_vec_count() ...
This creates an MSI-X counterpart for pci_msi_vec_count(). Device drivers
can use this function to obtain maximum number of MSI-X interrupts the
device supports and use that number in a subsequent call to
pci_enable_msix().
pci_msix_vec_count() supersedes pci_msix_table_size() and returns a
negative errno if device does not support MSI-X interrupts. After this
update, callers must always check the returned value.
The only user of pci_msix_table_size() was the PCI-Express port driver,
which is also updated by this change.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com >
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com >
Reviewed-by: Tejun Heo <tj@kernel.org >
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ff1aa430a2
